<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
	private $_id;
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	public function authenticate()
	{
		$username = strtolower($this->username);
		$member = Member::model()->find('LOWER(username)=?', array($username));
		if($member === null) {
			$this->errorCode = self::ERROR_USERNAME_INVALID;
		} elseif(!$member->validatePassword($this->password)) {
			$this->errorCode = self::ERROR_PASSWORD_INVALID;
		} else {
			$this->_id = $member->userid;
			$this->username = $member->username;
			$this->errorCode = self::ERROR_NONE;
		}
		return $this->errorCode == self::ERROR_NONE;
	}
	
	public function getId() {
		return $this->_id;
	}
}